CN116345526A - Control method and control device of wind-storage combined system - Google Patents
Control method and control device of wind-storage combined system Download PDFInfo
- Publication number
- CN116345526A CN116345526A CN202111595546.2A CN202111595546A CN116345526A CN 116345526 A CN116345526 A CN 116345526A CN 202111595546 A CN202111595546 A CN 202111595546A CN 116345526 A CN116345526 A CN 116345526A
- Authority
- CN
- China
- Prior art keywords
- wind
- grid
- active power
- reference value
- energy storage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000004146 energy storage Methods 0.000 claims abstract description 78
- 230000011664 signaling Effects 0.000 claims abstract description 3
- 238000005259 measurement Methods 0.000 claims description 25
- 230000005611 electricity Effects 0.000 claims description 14
- 238000004590 computer program Methods 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000010248 power generation Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 10
- 238000012545 processing Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 238000011217 control strategy Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
- H02J3/241—The oscillation concerning frequency
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
Disclosed are a control method and a control device for a wind-storage combined system, the wind-storage combined system including a wind power generator set and an energy storage device connected to a direct current bus of the wind power generator set, the control method comprising: based on the direct current bus voltage measured value and the direct current bus voltage reference value of the wind generating set, obtaining an output current reference value of energy storage equipment through proportional-integral operation, wherein the energy storage equipment is connected to the direct current bus through a DC/DC converter; acquiring a modulation duty ratio signal through proportional-integral operation based on an output current reference value and an output current measured value of the energy storage device; and generating a modulation signal for controlling the DC/DC converter based on the modulation duty ratio signal, and controlling the DC/DC converter according to the modulation signal, thereby adjusting the output current of the energy storage device.
Description
Technical Field
The present disclosure relates generally to the field of wind power generation technology, and more particularly, to a control method and a control device for a wind-storage combined system.
Background
In general, wind power converters employ grid-following (grid) or current source control strategies, however, applying the above strategies cannot adapt the wind turbine generator set to stable operation in weak grid conditions. Under the extreme condition that the wind generating set is off-grid, the strategy cannot effectively control the wind generating set to stably operate. Through researches, the direct-current energy storage device is additionally arranged on the direct-current bus of the wind power converter to provide inertia, so that the wind power generator set has similar voltage source characteristics as the traditional generator set, and the aim that the wind power generator set can still stably operate under the condition of weak current network is fulfilled.
FIG. 1 is a block diagram illustrating an example of a wind-powered storage complex system.
Referring to fig. 1, a wind energy storage combination system 1 comprises a wind power generator set and an energy storage device connectable to a direct current bus of the wind power generator set (i.e. a direct current bus between a machine side converter and a grid side converter) through a DC/DC converter. In the wind-storage combined system 1, the converter can adopt a virtual synchronous machine control strategy to control the connection of the wind-storage combined system and a power grid. In this case, the coordinated control of the stable operation of the wind turbine and the energy storage device becomes a difficulty in the control strategy of the wind power storage system.
Disclosure of Invention
The embodiment of the disclosure provides a control method and a control device for a wind power and energy storage combined system, which can coordinate and control a wind generating set and energy storage equipment to stably operate.
In one general aspect, there is provided a control method of a wind power storage combined system including a wind power generator set and an energy storage device connected to a direct current bus of the wind power generator set, the control method comprising: based on the direct current bus voltage measured value and the direct current bus voltage reference value of the wind generating set, obtaining an output current reference value of energy storage equipment through proportional-integral operation, wherein the energy storage equipment is connected to the direct current bus through a DC/DC converter; acquiring a modulation duty ratio signal through proportional-integral operation based on an output current reference value and an output current measured value of the energy storage device; and generating a modulation signal for controlling the DC/DC converter based on the modulation duty ratio signal, and controlling the DC/DC converter according to the modulation signal, thereby adjusting the output current of the energy storage device.
Optionally, the control method further includes: monitoring the SOC value of the energy storage device; and determining a network side active power reference value for controlling the network side converter of the wind generating set based on the monitored SOC value and the SOC reference value.
Optionally, the step of determining a grid-side active power reference value for controlling a grid-side converter of the wind park comprises: acquiring the active power deviation of the energy storage device through proportional integral operation based on the monitored SOC value and the SOC reference value; and determining a network side active power reference value based on the active power deviation and the active power measured value of the wind generating set.
Optionally, the step of determining a grid-side active power reference value for controlling a grid-side converter of the wind turbine further comprises: carrying out power limiting treatment on the active power deviation; wherein the step of determining the grid-side active power reference value based on the active power deviation and the active power measurement of the wind turbine generator set comprises: and determining a network side active power reference value based on the active power deviation and the active power measured value after the power limiting treatment.
Optionally, the control method further includes: determining a reference output voltage amplitude of the grid-side converter based on a reactive power reference value, a reactive power measurement value, a grid-side rated voltage value and a grid-side voltage measurement value of the wind generating set; determining a reference output voltage phase angle of the grid-side converter based on the grid-side rated angular speed, the grid-side real-time angular speed, the grid-side active power reference value and the grid-side active power measured value of the wind generating set; and controlling the grid-side converter based on the reference output voltage amplitude and the reference output voltage phase angle of the grid-side converter, so as to regulate the injection voltage of the grid-connected point of the wind generating set.
Optionally, the wind generating set is a voltage source type wind generating set.
In another general aspect, there is provided a control apparatus of a wind power storage combined system including a wind power generator set and an energy storage device connected to a dc bus of the wind power generator set, the control apparatus comprising: an output current reference value obtaining unit configured to obtain an output current reference value of an energy storage device through proportional integral operation based on a direct current bus voltage measured value and a direct current bus voltage reference value of the wind generating set, wherein the energy storage device is connected to the direct current bus through a DC/DC converter; the duty ratio signal acquisition unit is configured to acquire a modulation duty ratio signal through proportional-integral operation based on an output current reference value and an output current measured value of the energy storage device; and a DC/DC converter control unit configured to generate a modulation signal for controlling the DC/DC converter based on the modulation duty signal, and to control the DC/DC converter according to the modulation signal, thereby adjusting an output current of the energy storage device.
Optionally, the control device further includes: an active power reference value determination unit configured to: monitoring the SOC value of the energy storage device; and determining a network side active power reference value for controlling the network side converter of the wind generating set based on the monitored SOC value and the SOC reference value.
Optionally, the active power reference value determining unit is configured to: acquiring the active power deviation of the energy storage device through proportional integral operation based on the monitored SOC value and the SOC reference value; and determining a network side active power reference value based on the active power deviation and the active power measured value of the wind generating set.
Optionally, the active power reference value determining unit is further configured to: carrying out power limiting treatment on the active power deviation; and determining a network side active power reference value based on the active power deviation and the active power measured value after the power limiting treatment.
Optionally, the control device further includes: a grid-side converter control unit configured to: determining a reference output voltage amplitude of the grid-side converter based on a reactive power reference value, a reactive power measurement value, a grid-side rated voltage value and a grid-side voltage measurement value of the wind generating set; determining a reference output voltage phase angle of the grid-side converter based on the grid-side rated angular speed, the grid-side real-time angular speed, the grid-side active power reference value and the grid-side active power measured value of the wind generating set; and controlling the grid-side converter based on the reference output voltage amplitude and the reference output voltage phase angle of the grid-side converter, so as to regulate the injection voltage of the grid-connected point of the wind generating set.
Optionally, the wind generating set is a voltage source type wind generating set.
In another general aspect, there is provided a computer-readable storage medium storing a computer program which, when executed by a processor, implements a method of controlling a wind-powered electricity storage system as described above.
In another general aspect, there is provided a controller including: a processor; and a memory storing a computer program which, when executed by the processor, implements the control method of the wind-powered electricity storage combined system as described above.
In another general aspect, there is provided a wind-powered electricity storage system, the wind-powered electricity storage system comprising: a wind power generator set; an energy storage device connected to a direct current bus of the wind power generation set; a control device of a wind-storage combination system as described above or a controller as described above.
According to the control method and the control device of the wind power and energy storage combined system, the energy storage device can be used for maintaining the stability of the direct current bus, and the SOC of the energy storage device is kept in a normal range while the stable operation of the wind power generator set is realized, so that the coordination control of the wind power generator set and the energy storage device is realized.
Drawings
The foregoing and other objects and features of embodiments of the present disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings in which the embodiments are shown, in which:
FIG. 1 is a block diagram illustrating an example of a wind-powered electricity storage system;
FIG. 2 is a flow chart illustrating a method of controlling a wind-powered cogeneration system according to an embodiment of the disclosure;
FIG. 3 is a diagram illustrating an example of a control method of a wind-powered cogeneration system according to an embodiment of the disclosure;
FIG. 4 is a flow chart illustrating a method of controlling a grid-side converter of a wind turbine generator system in accordance with an embodiment of the present disclosure;
fig. 5 is a diagram illustrating an example of a control method of a grid-side converter of a wind turbine generator system according to an embodiment of the present disclosure;
FIG. 6 is a block diagram illustrating a control device of a wind-powered cogeneration system according to an embodiment of the disclosure;
fig. 7 is a block diagram illustrating a controller according to an embodiment of the present disclosure.
Detailed Description
The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, apparatus, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatuses, and/or systems described herein will be apparent after an understanding of the disclosure of the present application. For example, the order of operations described herein is merely an example and is not limited to those set forth herein, but may be altered as will be apparent after an understanding of the disclosure of the present application, except for operations that must occur in a particular order. Furthermore, descriptions of features known in the art may be omitted for clarity and conciseness.
The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided to illustrate only some of the many possible ways to implement the methods, devices, and/or systems described herein, which will be apparent after an understanding of the present disclosure.
As used herein, the term "and/or" includes any one of the listed items associated as well as any combination of any two or more.
Although terms such as "first," "second," and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first member, first component, first region, first layer, or first portion referred to in the examples described herein may also be referred to as a second member, second component, second region, second layer, or second portion without departing from the teachings of the examples.
In the description, when an element (such as a layer, region or substrate) is referred to as being "on" another element, "connected to" or "coupled to" the other element, it can be directly "on" the other element, be directly "connected to" or be "coupled to" the other element, or one or more other elements intervening elements may be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" or "directly coupled to" another element, there may be no other element intervening elements present.
The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. Singular forms also are intended to include plural forms unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, amounts, operations, components, elements, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, amounts, operations, components, elements, and/or combinations thereof.
Unless defined otherwise, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs after understanding this disclosure. Unless explicitly so defined herein, terms (such as those defined in a general dictionary) should be construed to have meanings consistent with their meanings in the context of the relevant art and the present disclosure, and should not be interpreted idealized or overly formal.
In addition, in the description of the examples, when it is considered that detailed descriptions of well-known related structures or functions will cause a ambiguous explanation of the present disclosure, such detailed descriptions will be omitted.
Application scenarios of the control method of the wind-storage combined system according to the embodiment of the present disclosure are as follows. In the case of weak grids, the grid frequency fluctuates (e.g., drops); after a grid-side converter of the wind generating set senses the fluctuation of the frequency of the power grid, the grid-connected power is automatically increased; because the generator inertia is large, the side power of the wind generating set is unchanged in a short time, and the voltage of the direct current bus is reduced due to power shortage; at this time, the energy storage device senses the voltage drop of the direct current bus, and the power injected into the direct current bus is rapidly increased through closed loop control, so that the bus voltage is rapidly restored to the rated value, and the injected power is transmitted to the power grid.
A control method and a control apparatus of a wind-storage combined system according to an embodiment of the present disclosure are described in detail below with reference to fig. 2 to 7.
Fig. 2 is a flowchart illustrating a control method of the wind-powered electricity storage combined system according to an embodiment of the present disclosure. Fig. 3 is a diagram illustrating an example of a control method of a wind-storage combined system according to an embodiment of the present disclosure. According to embodiments of the present disclosure, the control method may be performed by a controller (e.g., a master controller, a dedicated controller, etc.) provided in the wind-storage combination system. The wind energy storage combination system may include a wind power generator set and an energy storage device (e.g., without limitation, a battery) connected to a dc bus of the wind power generator set. The wind power generator set may be a voltage source type wind power generator set.
Referring to FIG. 2, in step S201, a DC bus voltage measurement u of a wind turbine may be based dc And a DC bus voltage reference value u dc * Obtaining an output current reference value I of the energy storage device through Proportional Integral (PI) operation * . As described above, the energy storage device may be connected to the direct current bus via a DC/DC converter. As shown in FIG. 3, a DC bus voltage reference u can be calculated dc * And DC bus voltage measurement u dc The difference is calculated and PI operation is carried out on the calculated difference, thus obtaining the output current reference value I of the energy storage device * 。
In step S202, a reference value I can be based on the output current of the energy storage device * And obtaining a modulation duty ratio signal through Proportional Integral (PI) operation together with the output current measured value I. As shown in fig. 3, the output current reference value I of the energy storage device can be calculated * And the difference with the output current measured value I, and performing PI operation on the calculated difference, thereby obtaining a modulation duty ratio signal.
In step S203, a modulation signal for controlling the DC/DC converter may be generated based on the modulation duty signal, and the DC/DC converter may be controlled according to the modulation signal, thereby adjusting the output current of the energy storage device. For example, a Pulse Width Modulation (PWM) signal for controlling the DC/DC converter may be generated based on the modulated duty cycle signal to control switching of the IGBT devices in the DC/DC converter to regulate the output current of the energy storage device.
Through the PI double-loop control mode, the stability of the direct current bus can be maintained through the energy storage equipment.
According to embodiments of the present disclosure, since the energy storage capacity of the energy storage device is limited, it is necessary to maintain the SOC value of the energy storage device within a normal range. To this end, the control method may further include the steps of: monitoring the SOC value of the energy storage device; based on the monitored SOC value (SOC) and the SOC reference value (SOC) * ) Determining a grid-side active power reference value P for controlling a grid-side converter of a wind turbine ref . More specifically, the active power deviation ΔP of the energy storage device may be obtained by a Proportional Integral (PI) operation based on the monitored SOC value and the SOC reference value bat . Then, the active power deviation DeltaP can be based bat Active power measurement value P of wind generating set gen Determining a network side active power reference value P ref . As shown in FIG. 3, the difference between the monitored SOC value and the SOC reference value can be calculated, and PI operation is performed on the calculated difference to obtain the active power deviation ΔP bat . In addition, the active power deviation DeltaP bat And active power measurement P gen The sum is determined as the network side active power parameterTest value P ref 。
Alternatively, the active power deviation ΔP may be calculated bat Performs power clipping processing and can be based on the active power deviation DeltaP subjected to the power clipping processing bat And active power measurement P gen Determining a network side active power reference value P ref 。
In the following, a control method of a grid-side converter of a wind power plant is described, which is part of the control method of a wind energy storage system.
Fig. 4 is a flowchart illustrating a method of controlling a grid-side converter of a wind turbine generator system according to an embodiment of the present disclosure. Fig. 5 is a diagram illustrating an example of a control method of a grid-side converter of a wind turbine generator system according to an embodiment of the present disclosure.
Referring to fig. 4, in step S401, a reactive power reference value Q may be based on the wind turbine generator set ref Reactive power measurement value Q, network side rated voltage value U N Network side voltage measurement U m Determining a reference output voltage amplitude U of the grid-side converter e . Specifically, as shown in fig. 5, first, the reactive power reference value Q may be calculated ref The difference from the reactive power measurement Q through a low pass filtering element, which may be expressed as
The calculated difference is then multiplied by the reactive droop coefficient R V The network side voltage compensation value deltau can be obtained. Next, the network side voltage compensation value DeltaU and the side rated voltage value U can be calculated N Sum as network side voltage reference value U ref . Finally, the network side voltage measurement U can be calculated m With the network side voltage reference value U ref And performing proportional-division (PI) operation on the calculated difference value to obtain a reference output voltage amplitude U of the grid-side converter e 。
In step S402, the grid-side nominal angular velocity ω of the wind turbine may be based on n Real-time angular velocity omega at the network side and active power reference value P at the network side ref Net side active power measurement value P e And determining a reference output voltage phase angle theta of the grid-side converter. Specifically, as shown in fig. 5, first, the net-side rated angular velocity ω can be calculated n Difference from the real-time angular velocity ω on the wire side. The calculated difference multiplied by the frequency droop coefficient R N The net side active power compensation value deltap can be obtained. Next, a net side active power reference value P can be calculated ref And the sum of the net side active power compensation value delta P, and then subtracting the net side active power measured value P passing through the low-pass filtering link e Divided by nominal angular velocity ω on the wire side n Obtaining the virtual electromagnetic torque increment delta T e . Increment virtual electromagnetic torque by delta T e Through the inertial damping link, the angular velocity increment delta omega can be obtained. In the inertia damping link, J represents the moment of inertia of the wind turbine generator system, and D represents the damping coefficient of the wind turbine generator system. Finally, the nominal angular velocity omega of the network side can be calculated n And the angular velocity increment deltaomega, and the calculated sum is subjected to integral conversion (expressed as 1/s in fig. 5) to obtain the reference output voltage phase angle theta of the grid-side converter.
In step S403, the reference output voltage amplitude U of the grid-side converter may be used e And controlling the grid-side converter by referring to the output voltage phase angle theta so as to adjust the injection voltage of the grid-connected point of the wind generating set. As shown in fig. 5, the reference output voltage amplitude U of the grid-side converter can be obtained e And the reference output voltage phase angle theta is input into a three-phase modulation wave calculation module so as to obtain an output voltage compacting time value U of the grid-side converter (inverter) o_abc . Then, the grid-side converter (inverter) outputs an electric compacting value U o_abc Input to a PWM (pulse width modulation) module, and pulse width modulated. The modulation signal after pulse width modulation can be input to the grid-side converter to control the switch of the IGBT device in the grid-side converter, so as to regulate the grid-connected point injection voltage of the wind generating set.
By calculating the network side active power reference value based on the SOC of the energy storage device, the automatic maintenance of the SOC can be realized while the stable operation of the wind generating set is maintained, so that the performance of the wind generating set is not influenced by the extra discharge of the energy storage device.
Fig. 6 is a block diagram illustrating a control apparatus of a wind-powered electricity storage combined system according to an embodiment of the present disclosure. According to embodiments of the present disclosure, the control device may be provided in a controller (e.g., a main controller, a dedicated controller, etc.) in the wind-storage integrated system, or may be implemented as a controller (e.g., a main controller, a dedicated controller, etc.) in the wind-storage integrated system. The wind energy storage combination system may include a wind power generator set and an energy storage device connected to a dc bus of the wind power generator set. The wind power generator set may be a voltage source type wind power generator set.
Referring to fig. 6, the control apparatus 600 includes an output current reference value acquisition unit 610, a duty ratio signal acquisition unit 620, and a DC/DC converter control unit 630. The current reference value obtaining unit 610 may be based on the measured value u of the dc bus voltage of the wind generating set dc And a DC bus voltage reference value u dc * Obtaining an output current reference value I of the energy storage device through Proportional Integral (PI) operation * . The duty cycle signal acquisition unit 620 may be based on the output current reference value I of the energy storage device * And obtaining a modulation duty ratio signal through Proportional Integral (PI) operation together with the output current measured value I. The DC/DC converter control unit 630 may generate a modulation signal for controlling the DC/DC converter based on the modulation duty signal, and control the DC/DC converter according to the modulation signal, thereby adjusting the output current of the energy storage device.
According to an embodiment of the present disclosure, the control device 600 may further include an active power reference value determining unit (not shown). The active power reference value determining unit may monitor an SOC value of the energy storage device, and may determine a grid-side active power reference value for controlling the grid-side converter of the wind turbine generator system based on the monitored SOC value and the SOC reference value. Specifically, the active power reference value determining unit may obtain an active power deviation of the energy storage device through a proportional-integral operation based on the monitored SOC value and the SOC reference value, and may determine a network-side active power reference value based on the active power deviation and an active power measurement value of the wind turbine generator set. Alternatively, the active power reference value determining unit may perform power clipping processing on the active power deviation, and may determine the network-side active power reference value based on the active power deviation subjected to the power clipping processing and the active power measurement value.
According to an embodiment of the present disclosure, the control device 600 may further comprise a grid-side converter control unit (not shown). The grid-side converter control unit may perform the following operations: reactive power reference value Q based on wind generating set ref Reactive power measurement value Q, network side rated voltage value U N Network side voltage measurement U m Determining a reference output voltage amplitude U of the grid-side converter e The method comprises the steps of carrying out a first treatment on the surface of the Grid-side rated angular velocity omega based on wind generating set n Real-time angular velocity omega at the network side, active power reference value at the network side and active power measurement value P at the network side e Determining a reference output voltage phase angle theta of the grid-side converter; reference output voltage amplitude U based on network side converter e And controlling the grid-side converter by referring to the output voltage phase angle theta so as to adjust the injection voltage of the grid-connected point of the wind generating set.
Fig. 7 is a block diagram illustrating a controller according to an embodiment of the present disclosure. The controller may be implemented as a controller (e.g., a master controller, a dedicated controller, etc.) in a wind-powered storage unit.
Referring to fig. 7, a controller 700 according to an embodiment of the present disclosure may include a processor 710 and a memory 720. Processor 710 may include, but is not limited to, a Central Processing Unit (CPU), a Digital Signal Processor (DSP), a microcomputer, a Field Programmable Gate Array (FPGA), a system on a chip (SoC), a microprocessor, an Application Specific Integrated Circuit (ASIC), and the like. Memory 720 may store computer programs to be executed by processor 710. Memory 720 may include high-speed random access memory and/or a non-volatile computer-readable storage medium. When the processor 710 executes the computer program stored in the memory 720, a wind-stored-energy joint frequency modulation method as described above may be implemented.
Alternatively, the controller 700 may communicate with other various components in the wind farm in a wired/wireless communication manner, as well as with other devices in the wind farm in a wired/wireless communication manner. In addition, the controller 700 may communicate with devices external to the wind farm in a wired/wireless communication.
The control method of the wind-powered electricity generation combined system according to the embodiment of the present disclosure may be written as a computer program and stored on a computer-readable storage medium. The control method of the wind power storage system as described above may be implemented when the computer program is executed by a processor. Examples of the computer readable storage medium include: read-only memory (ROM), random-access programmable read-only memory (PROM), electrically erasable programmable read-only memory (EEPROM), random-access memory (RAM), dynamic random-access memory (DRAM), static random-access memory (SRAM), flash memory, nonvolatile memory, CD-ROM, CD-R, CD + R, CD-RW, CD+RW, DVD-ROM, DVD-R, DVD + R, DVD-RW, DVD+RW, DVD-RAM, BD-ROM, BD-R, BD-R LTH, BD-RE, blu-ray or optical disk storage, hard Disk Drives (HDD), solid State Disks (SSD), card memory (such as multimedia cards, secure Digital (SD) cards or ultra-fast digital (XD) cards), magnetic tape, floppy disks, magneto-optical data storage, hard disks, solid state disks, and any other means configured to store computer programs and any associated data, data files and data structures in a non-transitory manner and to provide the computer programs and any associated data, data files and data structures to a processor or computer to enable the processor or computer to execute the programs. In one example, the computer program and any associated data, data files, and data structures are distributed across networked computer systems such that the computer program and any associated data, data files, and data structures are stored, accessed, and executed in a distributed manner by one or more processors or computers.
According to the control method and the control device of the wind power and energy storage combined system, the energy storage device can be used for maintaining the stability of the direct current bus, and the SOC of the energy storage device is kept in a normal range while the stable operation of the wind power generator set is realized, so that the coordination control of the wind power generator set and the energy storage device is realized.
Although a few embodiments of the present disclosure have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the disclosure, the scope of which is defined in the claims and their equivalents.
Claims (15)
1. A control method of a wind-storage combined system, the wind-storage combined system including a wind power generator set and an energy storage device connected to a dc bus of the wind power generator set, the control method comprising:
based on the direct current bus voltage measured value and the direct current bus voltage reference value of the wind generating set, obtaining an output current reference value of energy storage equipment through proportional-integral operation, wherein the energy storage equipment is connected to the direct current bus through a DC/DC converter;
acquiring a modulation duty ratio signal through proportional-integral operation based on an output current reference value and an output current measured value of the energy storage device;
and generating a modulation signal for controlling the DC/DC converter based on the modulation duty ratio signal, and controlling the DC/DC converter according to the modulation signal, thereby adjusting the output current of the energy storage device.
2. The control method according to claim 1, characterized in that the control method further comprises:
monitoring the SOC value of the energy storage device;
and determining a network side active power reference value for controlling the network side converter of the wind generating set based on the monitored SOC value and the SOC reference value.
3. The control method according to claim 2, wherein the step of determining a grid-side active power reference value for controlling a grid-side converter of the wind park comprises:
acquiring the active power deviation of the energy storage device through proportional integral operation based on the monitored SOC value and the SOC reference value;
and determining a network side active power reference value based on the active power deviation and the active power measured value of the wind generating set.
4. A control method according to claim 3, wherein the step of determining a grid-side active power reference value for controlling a grid-side converter of the wind park further comprises: carrying out power limiting treatment on the active power deviation;
wherein the step of determining the grid-side active power reference value based on the active power deviation and the active power measurement of the wind turbine generator set comprises: and determining a network side active power reference value based on the active power deviation and the active power measured value after the power limiting treatment.
5. A control method according to claim 3, characterized in that the control method further comprises:
determining a reference output voltage amplitude of the grid-side converter based on a reactive power reference value, a reactive power measurement value, a grid-side rated voltage value and a grid-side voltage measurement value of the wind generating set;
determining a reference output voltage phase angle of the grid-side converter based on the grid-side rated angular speed, the grid-side real-time angular speed, the grid-side active power reference value and the grid-side active power measured value of the wind generating set;
and controlling the grid-side converter based on the reference output voltage amplitude and the reference output voltage phase angle of the grid-side converter, so as to regulate the injection voltage of the grid-connected point of the wind generating set.
6. The control method according to claim 1, wherein the wind power generation unit is a voltage source type wind power generation unit.
7. A control device of a wind-energy-storage-combined system, the wind-energy-storage-combined system comprising a wind power generator set and an energy storage device connected to a dc bus of the wind power generator set, the control device comprising:
an output current reference value obtaining unit configured to obtain an output current reference value of an energy storage device through proportional integral operation based on a direct current bus voltage measured value and a direct current bus voltage reference value of the wind generating set, wherein the energy storage device is connected to the direct current bus through a DC/DC converter;
the duty ratio signal acquisition unit is configured to acquire a modulation duty ratio signal through proportional-integral operation based on an output current reference value and an output current measured value of the energy storage device;
and a DC/DC converter control unit configured to generate a modulation signal for controlling the DC/DC converter based on the modulation duty signal, and to control the DC/DC converter according to the modulation signal, thereby adjusting an output current of the energy storage device.
8. The control device of a wind-powered electricity generation system of claim 7, wherein the control device further comprises:
an active power reference value determination unit configured to: monitoring the SOC value of the energy storage device; and determining a network side active power reference value for controlling the network side converter of the wind generating set based on the monitored SOC value and the SOC reference value.
9. The control device of a wind-powered electricity storage system according to claim 8, wherein the active power reference value determining unit is configured to: acquiring the active power deviation of the energy storage device through proportional integral operation based on the monitored SOC value and the SOC reference value; and determining a network side active power reference value based on the active power deviation and the active power measured value of the wind generating set.
10. The control device of a wind-powered electricity storage system as recited in claim 9, wherein the active power reference value determination unit is further configured to: carrying out power limiting treatment on the active power deviation; and determining a network side active power reference value based on the active power deviation and the active power measured value after the power limiting treatment.
11. The control device of a wind-powered electricity generation system of claim 8, wherein the control device further comprises:
a grid-side converter control unit configured to: determining a reference output voltage amplitude of the grid-side converter based on a reactive power reference value, a reactive power measurement value, a grid-side rated voltage value and a grid-side voltage measurement value of the wind generating set; determining a reference output voltage phase angle of the grid-side converter based on the grid-side rated angular speed, the grid-side real-time angular speed, the grid-side active power reference value and the grid-side active power measured value of the wind generating set; and controlling the grid-side converter based on the reference output voltage amplitude and the reference output voltage phase angle of the grid-side converter, so as to regulate the injection voltage of the grid-connected point of the wind generating set.
12. The control device of a wind power storage system according to claim 6, wherein the wind power generator unit is a voltage source type wind power generator unit.
13. A computer readable storage medium storing a computer program, characterized in that the computer program, when executed by a processor, implements a method of controlling a wind energy storage system according to any one of claims 1 to 6.
14. A controller, the controller comprising:
a processor;
a memory storing a computer program which, when executed by a processor, implements a method of controlling a wind energy storage system according to any one of claims 1 to 6.
15. A wind-powered electricity storage combination, the wind-powered electricity storage combination comprising:
a wind power generator set;
an energy storage device connected to a direct current bus of the wind power generation set;
a control device for a wind energy storage system according to any of claims 7 to 12 or a controller according to claim 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111595546.2A CN116345526A (en) | 2021-12-24 | 2021-12-24 | Control method and control device of wind-storage combined system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111595546.2A CN116345526A (en) | 2021-12-24 | 2021-12-24 | Control method and control device of wind-storage combined system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116345526A true CN116345526A (en) | 2023-06-27 |
Family
ID=86877692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111595546.2A Pending CN116345526A (en) | 2021-12-24 | 2021-12-24 | Control method and control device of wind-storage combined system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116345526A (en) |
-
2021
- 2021-12-24 CN CN202111595546.2A patent/CN116345526A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Mandic et al. | Lithium-ion capacitor energy storage integrated with variable speed wind turbines for power smoothing | |
| JP6604599B2 (en) | Power conversion system and method with transient event ride through capability | |
| Bazargan et al. | Stability analysis of converter-connected battery energy storage systems in the grid | |
| Ahmad et al. | An improved power control strategy for grid‐connected hybrid microgrid without park transformation and phase‐locked loop system | |
| Song et al. | A novel adaptive control scheme for dynamic performance improvement of DFIG-Based wind turbines | |
| CN107769265B (en) | Control method and system of voltage type inverter | |
| CN115940296B (en) | Wind-storage combined inertia response method and inertia response device | |
| CN110752762A (en) | Control method for parallel virtual capacitor of grid-connected converter | |
| CN116799857A (en) | PCS frequency modulation control method, device and equipment for energy storage converter and storage medium | |
| CN105490320A (en) | Energy storage method and system for photovoltaic power station | |
| WO2024066712A1 (en) | Control method and apparatus, and medium, controller and wind generating set | |
| CN115839305B (en) | Wind-storage combined frequency modulation method and wind-storage combined frequency modulation device | |
| CN116345526A (en) | Control method and control device of wind-storage combined system | |
| WO2023108925A1 (en) | Wind turbine generator set, and control method and apparatus for wind power converter | |
| WO2023019817A1 (en) | Control method and control apparatus for voltage source-type wind turbine | |
| CN112653184B (en) | Identification method, device, terminal and medium for black box model of wind power generation equipment | |
| Qin et al. | The feasibility study on thermal loading control of wind power converters with a flexible switching frequency | |
| Hackl et al. | Non-ideal feedforward torque control of wind turbines: Impacts on annual energy production & gross earnings | |
| WO2023108923A1 (en) | Control method and control apparatus for voltage-source-type wind generating set | |
| CN115708284A (en) | Control method and control device of wind generating set | |
| CN116316902A (en) | Control method and control device of voltage source type wind generating set | |
| CN113013926A (en) | Distributed grid-connected power generation system sequence impedance aggregation method and system | |
| CN116264391A (en) | Control method and control device of voltage source type wind generating set | |
| CN115276041B (en) | Control method, device, medium, controller and wind generating set | |
| Pourjafari et al. | A new approach in sensor-less vector control of stand-alone doubly fed induction generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 830026 No. 107, Shanghai Road, Urumqi economic and Technological Development Zone, the Xinjiang Uygur Autonomous Region Applicant after: Jinfeng Technology Co.,Ltd. Address before: 830026 No. 107, Shanghai Road, Urumqi economic and Technological Development Zone, the Xinjiang Uygur Autonomous Region Applicant before: XINJIANG GOLDWIND SCIENCE & TECHNOLOGY Co.,Ltd. |